MeiG Smart product technical information
SLM758
Hardware Design Guide
Page 60
4.18.2 DRX Antenna
The module provides the DRX antenna interface pin RF_DIV, and the antenna on the user's
motherboard should be connected to the module's antenna pins using a 50-ohm characteristic
microstrip or stripline.
In order to facilitate antenna debugging and certification testing, an RF connector and
antenna matching network should be added. The recommended circuit diagram is as follows:
Figure 4.36: DRX Antenna Interface Connection Circuit
In the figure, R102, C103, and C104 are antenna matching devices, and the specific
component values can be determined after the antenna factory debugs the antenna. Among
them, R102 defaults to 0R, C103 and C104 are not posted by default.
If there are fewer components between the antenna and the module output, or if the RF test
head is not needed in the design, the antenna matching circuit can be simplified as shown
below:
Figure 4.37: DRX Antenna Interface Simplified Connection Circuit
In the above figure, R102 defaults to 0R, C103 and C104 are not attached by default.
